33) Calculate the mean of the following data.
Class Interval
Frequency
10 - 25
25 - 40
40 - 55
55 - 70
70 - 85
85 - 100
OR
Answers
Answer:
there was the answer my answer is 100 - 115 ,115 - 130
Answer:
Here is the complete question ...
Class Interval Frequency (fi) (xi) fixi
10 - 25 2 17.5 35.0
25 - 40 3 32.5 97.5
40 - 55 7 47.5 332.5
55 - 70 6 62.5 375.0
70 - 85 6 77.5 465.0
85 - 100 6 92.5 555.0
∑fi = 30 ∑fixi = 960.0
. Formula Used and Method Used:-
x = ∑fixi
∑fi
. Direct Method
.Solution :-
To find xi :-
. UL + LL / 2
= 960.0 divided by 30
= 32.0 is the answer